I posted this separetely because I wanted to have comarision the images show up at once rather four separete times.
So shortly after processing this image using the traditional SHO Palette combination last month I happened to watch a video by Cuiv, The Lazy Geek (
AMAZING Hubble Palette technique!) where he described a new SHO processing method developed by Steven Miller of Entering Into Space. Steve's video (
Colorized SHO Palette NO MORE FIGHTING THE GREEN!) is very comprehensive and definitely worth a watch as is Cuiv's. The basic premises of this method is to colorize the Hydrogen, Sulfur, and Oxygen prior to combining them. The benefit of doing this eliminates the oversaturated green tint that typically is produced when combined. Additionally I learned a lot of new PisInsight tricks such as making masks with the ACDNR noise reduction function.
Method SummaryData from narrowband filters is gray so it is simply combined directly into the desired channel bands. The summarized version of using this method is as follows: First do your normal linear processing on each filtered band and then change each image from gray to RGB. Second, make the images nonlinear and equalize the backgrounds - I did this using EZ Soft Stretch which automatically stretches it and equalizes the background. Third, colorize the Ha to a gold color, the OIII to a deep blue color, and the sulfur to a red-yellow color. Lastly, the images are combined using PixelMath. The color combination selection in PixInsight will not work on RGB data.
Not sure if anyone does this but it seems interesting and appears to have brought out more nebulosity.
Let me know if one version looks better than another.
For information, results, and separete colorized channels see:
http://astroquest1.blogspot.com/2023/03/ic-410-reprocessed-using-colorized-sho.html
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